The image shows a cluster of roughly 3,000 stars called Westerlund 2. The dazzling array is located in the Carina constellation, and, like most of NASA's most unforgettable images, it's not too likely anyone looking at now it will ever get to visit. Though the image is inviting, the cluster it shows is approximately 20,000 light-years away from Earth.

Source: Mic/NASA

Hubble was launched into space in 1990, and since then its breathtaking photos have helped transform our understanding of the universe. Thanks to Hubble, scientists were able to calculate the age of the universe, at roughly 13 to 14 billions years and learn more about astronomical phenomena like quasars and dark energy.

Earth-bound telescopes, hobbled by the atmosphere, cannot capture the universe in all its psychedelic splendor. By allowing humans to look at space from space, Hubble has brought the majesty of the universe into sharper focus than ever before.

So, without further ado, here are 25 of Hubble's greatest hits from 25 years of memorable service.